/Engine/Source/Editor/UnrealEd/Public/AssetEditorViewportLayout.h
Create an instance of a custom viewport from the specified viewport type name
virtual [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > FactoryViewport ( [FName](API\Runtime\Core\UObject\FName) InTypeName, const [FAssetEditorViewportConstructionArgs](API\Editor\UnrealEd\FAssetEditorViewportConstruction-) & ConstructionArgs )